With tail flit and flashOf deep purple and blue hueBird perched in tree signals:Would be predators, lurking -You've been seen, so give hunt up

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<<Note:>> Why do many small birds flick their tails to reveal flashes of brightly colored feathers? It is not for balance; it does not help to protect territories; nor does it improve foraging or social interactions. Instead, it is a signal to predators that they have been seen by the bird and so the bird is not worth pursuing. The predator's hunting game of stealth it up! They were being watched, game over.